# -*- coding: utf-8 -*-#
#-------------------------------------------------------------------------------
# 建立者:        潘炎珍  
# Name:         demo16
# Description:
# Author:       98745
# Date:         2019/3/9
#-------------------------------------------------------------------------------

import math
print('圆周率','=',math.pi)
print('自然数','=',math.e)
print(math.fabs(-1.0))
print(math.ceil(1.3))
print(math.floor(1.7))
print(math.sqrt(8))
print(math.pow(2,8))
print(math.sin(math.pi/2))
print(math.cos(math.pi))
print(math.tan(math.pi/4))